As you are walking along a beach, you find an animal and believe that it belongs to the class Asteroidea. Which of the following characteristics would support your hypothesis that the animal is a sea star and not another type of echinoderm? a. It feeds on other animals. b. It has a hydrostatic skeleton, formed from its water vascular system. c. Its central region is not well delineated from its appendages. d. It is pentaradially symmetric.
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